Automatic flush valve



' Jan. 15, 1935.

Jv A. SV'EJDA AUTOMATIC FLUSH VALVE Filed Sept. 1'7, 1932 4Sheets--Sheet INVENTOR.

JAROSLAV A. SVEJDA ATTORNEYS Jan. 15, 1935. J. A. SVEJDA 1,987,843

AUTOMATIC FLUSH VALVE Filed Sept. 17, 1932 Sheets-Sheet 2.

C J f1g 5 i l Q \l R a 1 27 27 fzg 4' HI 1 L L IO 24 NH INVENTOR.

JAROSLAV A. SVEJDA ATTORNEYS J. A. svEJciA 1,987,843

AUTOMATIC FLUSH VALVE Filed Sept. 17, 1932 4 Sheets-Sheet 4 INVENTOR.

JAROSLAV A. SVEJDA Ail,

ATTORNEYS Patented Jan. 15, 1935 Tiiie mventron lates toa'n'improvementm flushing v'alv'es to a'tef clbsets and the like.

The inventio relates "particularly to. the class the ne er water; rrom'a supply pipe and therefore-the usual jreserv'oir or" f inwardly tocock the operating crank;

ticularly to en finpioved closets; it suitable-"for use in other "6 ch Hof Valve is adapted; n "tioniato' construct a v'alve to'operaautomaticallyfl'after a peeve a ne-sw mme s; r w a ly .1ahe l ds 'tha hi m f mevmve "opration the pressure "of the e v e nvm'eh aa fiv l sconee w -serving"'to peraite "thei'vflalves to permifa pie deterfiiined"-anew ofwater tof i lo'" type or automatieflush ing valve particularlyadapte'dioi usewith water" tion; v t. A Figure 1 is avertical'sectionalview through the Y valve assembly in normal'positio'n;I Figure 2 -is-'a' vertical sectional'view through 4 the valve assemblyshowing the push pin pressed i In the drawings, accompanying thisspeciflca Figure 3 is a verticalsectionalview through the'valv'e:assemblypshowing the push pin in normal position and the" valvepiston Figure 4 11s a vertical-sectional viewthrough part of the valvecasing and push pin assembly, showing the main valve closed;

Figures '5 and 6 show exterior views of. the 1 assembled cylinder imitready to be placed in casing with a universal *push pinhousing at-'Figure 8 is a section or Figure9 is an outline ot the universal push Ithe-push pin taken I on'line 8-8 ofFigure 7;" h

Another object of the inventzednis to'provide pin housing showing a pushbutton instead of the handle arrangementas shown in Figure 7;

Figure 10 is ajvertical sectional view of the valve-piston andcylinderas assembled before being placedin-th'e valve casing:

igure- 111s a sectional viewof the push 'pin" casing; J

: 62'is connected byi means or Figure 12 eneleveuoner Figure 11, viewed'from the left, showing a transparent butto'n'and' index'platei 1 3"and-14are plan and sectionaliviews,

" respectivelmof the'leather cup sprin'gfand' Figure '15' is a verticalsectional view of a} water 1 cldset-z showln'g the flushing valve inpositio'n thereon. I,

- -Assl1own in the drawings:

- The valve consists-of a niain 'ca'sing provided with 'a bossBO;thereon, in whichan inlet pipe 61 is threaded? "Atiit'sljower -end, -thecasing is pro vided with an adapter 41, w which the outlet'pipe theconnection-gland; 43 and the }packifig 42. A I

The valve casing Iris-closed at" its upper end 'I'heizcap' i'iwhisprovided on its l'ower inner. edgewiths'orewthreadsrengagih'gicorrespondingscrew=I-- threads onfa locknutifiglatentdlee-described; .Pr

apparent as the description proce'ds.

":1 Mounted vvithin the valve flcasingz ls a cylinder-i unit otithe"configuration *shown'in -Figs.- 5iriand:6 and having for its internalparts the valve memassemblybefore placed in the va'lve' I bers about tobe described. The unit consists of a cylinder 2 closed at its upper endby means of a cylinder head 3, which head in turn bears upon a gasket 4to provide a water-tight fit at this point. The cylinder unit is securedin place by means of a cylinder lock nut 5 which also serves as a meansfor holding the cap 36.

Mounted within the cylinder is a piston in the form of a leather cup 6,which is made of thin leather, said cup being-held in contact with thewall of the cylinder by means of a piston leather cup spring 7, shownmore clearly in Figs. 13 and 14. This spring is generally cup shaped,the sides thereof being formed of a plurality of resilient segments 7and provided with an opening which will permit the spring to beassembled over the piston stem 16. Surrounding the piston stem 16' is apiston collar 8 supporting the piston leather cup. The piston collar isprovided at its lower edge with a seat washer 9, said washer engagingthe seat 9' formed in the valve casing 1. This seat 9 constitutes theseat of the main valve member including the piston 6. The washer 9 isheld between the piston collar and the lower extremity of the pistonstem 16'.

Integrally secured to the piston stem 16' is a piston body 10 which isfor a purpose later to be described. The piston stem is screw threadedinteriorly and thereto is attached a piston guide 11 provided with ahole 11' which guide is adapted to reciprocate up and down upon a stem1'7, which stem mounts a coiled lifting spring 18, held undercompression, normally, by the piston guide 11, when the piston is in itslower position.

secondarily to the piston valve or main valve is a relief valve 12, madeof metal and of elongated cylindrical form, floating rather freelywithin the piston guide 11, and normally seated upon a washer 13,secured in place by means of a washer collar 14. This relief valve isguided by means of a guide 15, fitting within the inside chamber of thepiston guide 11, and is free to rise into a hollow space formed in thestem 1'7. The stem 17 is secured to the cylinder head 3 by means of anut 19 screw threaded upon the stem.

The chamber above the piston communicates with the chamber beneath bymeans of a passage '70 and opening '71, which opening is controlled by aneedle valve 20, adjusted by means of a screwnut 21, said needle valvehaving a watertight fit within the packing 22. Since the needle valve isplaced upon the upper part of the cylinder unit, it is accessiblefor-adjustment by removing cap 36.

Depending downwardly from the cylinder unit is an operating crank 23,pivoted to the body 10 at 26, said crank having pivoted thereto at 25, apawl 24. Side and elevation views of the parts referred to may be seento better advantage in Figs. 5 and 6.

The crank 23 is actuated from a point outside of the valve casing 1, bymeans of a reciprocating push pin 2'7 which is bifurcated, as shown inFig. 8, so that depending crank 23 will be positioned between thebifurcations. The push pin 27 passes through the valve easing into astufilng box 28, provided with a gland 29 and packing 30. The push pinis urged outwardly by means of a spring 31, held between the stuffingbox and the push button retainer 33. The retainer is secured to the pushpin by a screw and is provided with a freely slidable guide 32 whichalso serves to secure the push pin button 34 in place. Preferably, thispush button is transparent so that an index plate 48, mounted on theface of the retainer, as

shown in Fig. 12, may be visible, therethrough. If desired, an operatinghandle 46 secured to the stuffing box my means of a retainer 47, asshown in Fig. 7, may be substituted for the push button.

Situated in the valve casing, at a point somewhat below the main valveseat 9 and near the discharge pipe 62, is an air vent pipe 40, directeddownwardly towards the bowl of the water closet. This vent pipecommunicates with the atmosphere at and admits air which can beentrained with the flushing water to increase the cutting actionthereof.

Figure '7, shows a modification of the push pin housing in that it takesthe form of a housing or casing 44 which is detachably secured to themain valve casing by means of a nut 45. In this manner, the housing 44may be turned to any position about its vertical axis so that the pushbutton or handle can be placed in a position most suitable to the finalinstallation, that is, right-handed, left-handed, central position, etc.By this arrangement, it is unnecessary to carry on hand an excess numberof types of valves, the universal housing enabling one type of valve toserve for any installation called for. By virtue of the novel cylinderunit employed, this can also be turned in the valve casing to conform tothe position of the push pin housing, thus providing a very flexiblearrangement and saving tremendously on the number of parts and styles ofvalves that must be stocked by a dealer.

Figure 3 shows a valve casing provided with a plain cap 50, omitting thebumper head 37.

In Figure 1, a stop cock arrangement, shown generally at 49, is providedin the water inlet pipe 65 and permits water to pass to the second inletpipe 61. This stop cock may be closed entirely when it is desired toperform some work upon the cylinder unit, but it is not necessary toclose it when an adjustment is to be made to the screw needle valve 20.This stop cock forms no part .of this invention, the same being reservedto form the basis for another application for patent, about to be filed.

The operator, desiring to flush the water closet or similar device,pushes inwardly upon the push button, thereby actuating the crank 23which in turn, in its upward movement engages the relief valve 12,thereby unseating the same. Thereupon, the water which has gainedadmission to the chamber above the piston, by means of passage 70 andopening '71 and has found its way into the chamber surrounding therelief valve, by virtue of the opening 11', is caused to flow past therelief valve seat into the discharge pipe.

This flow of water causes a release of pressure upon the upper surfaceof the piston and due to an unbalanced pressure, the piston and itsassociated parts will rise, being aidedby the unleashing of the forcestored up in the lifting spring 18. As soon as this occurs, the mainvalve or piston is raised above the main seat'9, as shown in Fig. 3, andthe principal flushing action takes place, water flowing directly fromthe *inlet pipe 61, across the seat 9' to the discharge pipe 62. Thisflow of water in passing pipe 40, causes air to be sucked into thestream, through opening 40' and the cutting action of the water isincreased.

The time during which the principal flushing action will take place isregulated by means of be regulated without shutting oil the watersupply, it being only necessary to remove cap 36, to make the properadjustment by means the needle valve.

It will be seen from Figs. and 8, that the entire cylinder together withthe main and relief valves, is removable as a unit, and such arrangementrenders repairing and cleaning very easy.

A new unit may be placed in the valve casing much quicker than majorrepairs can be made in flush valves now on the market. Should thecylinder unit be removed, the water supply is shut of! by means of thestop cock.

Various details of construction may be varied without departing from theprinciples of this invention and the patent granted is not to be limitedotherwise than will be necessitated by the prior art.

What I claim is:--.

1. A flush valve comprising a valve casing in which is mounted acylinder having a head closing one end thereof, two valves in saidcylinder, one of said valves being the main valve controlling the flowof water, the other valve being a self-closing relief valve carried bysaid main valve, means carried by said main valve for actuating saidrelief valve to open it, means carried by said head for lifting saidmain valve, said cylinder, head, valves and relief valve actuatingmeansbeing adapted for removal from said valve casing as a unit.

2. In a flush valve, a casing, a cylinder including a head removablysecured in said casing, a valve seat disposed in said casing below saidcylinder, a main valve comprising a piston in said cylinder dividing thesame into a plurality of chambers, a passage connecting the chambers oneach side of said piston valvular means controlling said passage, aself-closing relief valve in the piston adapted to release the pressurefrom the upper side thereof, means carried by said head to aid inlifting said piston upon the release of said pressure, and means foractuating

